CRIPSR-Cas9 technology allows scientists to edit genes with precision. But is this a beneficial tool or something more nefarious? In this episode, we conclude our conversation with Dr. Rodolphe Barrangou, one of the scientists who discovered CRISPR, and dive into the applications, ethical conundrums, and challenges of this new genetic tool. He also issues a challenge to all scientists about our responsibilities to share our work with the rest of the world.